First Person health system

I have a question about the First Person Template: I want to create a health system for my game. There are already some tutorials for the third person template, which are all based on variables. But for the first person template there are none. This is probably because you can not add variables to this template.
Therefore I wanted to ask if, and how it is possible to create a health system.
Thanks for your answers!

You can. There is no difference.

can you really do that. As far as I know, the variables tab should be under here, but it is not. Do I just have to add them with a right click in the blueprint? (i might be wrong about that, as I am relatively new to Unreal Engine.

The panel has been closed:


Oh, yes, my fault. Thanks a lot!